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National Maritime Center Providing Credentials to Mariners U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants (Sample Examination) Page 1 of 34 Q602 Motor Plants 8/30/2017

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National Maritime Center Providing Credentials to Mariners

U.S.C.G. Merchant Marine Exam

Chief Engineer-Limited

Q602 Motor Plants

(Sample Examination)

Page 1 of 34 Q602 Motor Plants

8/30/2017

U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17

Choose the best answer to the following Multiple Choice Questions.

1. Which of the following precautions should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger?

o (A) Reduce engine speed to idle before removing the filter. o (B) Soak the dirty filter in kerosene only. o (C) Blow out the air inlet with compressed air. • (D) With the engine stopped, cover the air inlet after removing the filter.

If choice D is selected set score to 1.

2. A decrease in the flash point of diesel engine lube oil indicates the lube oil has become __________.

• (A) diluted with fuel oil o (B) contaminated with sludge o (C) diluted with water o (D) contaminated with carbon

If choice A is selected set score to 1.

3. The cylinders labeled "B" and "C" in the illustration are used to __________. Illustration MO-0125

o (A) supply a specific volume of oil to the engine governor o (B) provide oil to lubricate component "F" o (C) provide the required quantity of grease at specified maintenance intervals • (D) supply the force required to shift the engine camshafts axially to reverse engine rotation

If choice D is selected set score to 1.

4. A diesel-generator governor is hunting. After changing the oil, the governor is flushed and the compensation needle valve is adjusted, but the hunting persists. You should NOW __________.

o (A) set the speed droop adjustment to zero o (B) calibrate the fuel pump rack settings • (C) carefully check for binding in the governor linkage o (D) check air intake manifold pressure

If choice C is selected set score to 1.

5. An operating diesel engine that suddenly loses power, is due to a/an __________.

o (A) dribbling injector o (B) oil leak into the turbocharger o (C) low fuel viscosity • (D) restricted turbocharger air intake

If choice D is selected set score to 1.

Page 2 of 34 Q602 Motor Plants

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U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 6. Following the failure of one turbocharger on a large, crosshead, main propulsion diesel engine, fitted

with multiple turbochargers, which of the following actions should be taken prior to further operation of the engine?

o (A) Lock the rotor of the damaged turbocharger. o (B) Secure cooling and lubrication to the damaged turbocharger. o (C) Blank off the exhaust gas inlet to the damaged turbocharger. • (D) All of the above.

If choice D is selected set score to 1.

7. A large change in ambient temperature, or using an oil of a viscosity different than the one recommended by the manufacturer in a mechanical hydraulic governor, will result in the need to adjust the __________.

o (A) accumulator spring tension • (B) compensating needle valve o (C) pilot valve opening o (D) compensating spring tension

If choice B is selected set score to 1.

8. A dirty lube oil strainer can result in __________.

o (A) excessive oil consumption o (B) low lube oil temperature o (C) crankcase dilution • (D) low bearing oil pressure

If choice D is selected set score to 1.

9. The reversing cams of some four-stroke cycle diesel engines are brought into position by __________.

o (A) moving the idler sprockets in the drive chain • (B) sliding the camshaft along its axis o (C) rotating the cam followers 180° o (D) rotating the cam 180°

If choice B is selected set score to 1.

Page 3 of 34 Q602 Motor Plants

8/30/2017

U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 10. In pre-treating fuel oil on a motor vessel, what would you consider the most important factor to

prevent high temperature corrosion on an engine's combustion components?

o (A) Recycle the fuel between the settling tank(s) and service tank via centrifuges more than once. o (B) Monitor engine(s) exhaust temperatures more closely. • (C) Run one centrifuge as a purifier at a reduced rate to minimize water, especially salt water, in

the fuel. o (D) Drain settling tank(s) and service tank more often only.

If choice C is selected set score to 1.

11. If the separating temperature is to remain constant, what is the relationship between the specific gravity of the oil and the required size of the regulating ring? Illustration MO-0113

o (A) For a constant operating temperature, the greater the specific gravity of the oil the larger the regulating ring.

• (B) The larger sized regulating rings are designed to be used with oils of lower specific gravities. o (C) The specific gravity of the oil and the size of the regulating ring are related only during the

initial design stages of the centrifuge. o (D) With oils of greater specific viscosities it is proper to select smaller regulating rings regardless

of the operating temperatures desired.

If choice B is selected set score to 1.

12. One method of determining crankshaft misalignment is by __________.

o (A) laying a straight edge across the crank webs at the crank pin and measuring the distance to the crank pin in two places

• (B) taking micrometer readings between the crank cheeks opposite the crank pin every 90° of crank angle rotation

o (C) measuring the crank drop on either side of each crank throw while the crankshaft is slowly rotated through one revolution

o (D) rotating the crankshaft through one revolution, pausing each 90° of rotation to measure bearing clearances, top and bottom

If choice B is selected set score to 1.

13. Which of the following problems is the main source of fuel pump and injection system malfunctions?

o (A) Coated fuel lines o (B) Improper lubrication • (C) Air in the fuel system o (D) Excessive vibration

If choice C is selected set score to 1.

Page 4 of 34 Q602 Motor Plants

8/30/2017

U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 14. A diesel engine may fail to start when being cranked, due to __________.

• (A) insufficient compression o (B) high cetane number o (C) low lube oil viscosity o (D) high lube oil pressure

If choice A is selected set score to 1.

15. If a scavenging air space fire occurs on a slow-speed diesel engine and the engine is stopped, which of the following should be done to prevent distortion due to heat?

o (A) Let the fire burn out naturally. • (B) Engage and turn the engine with the jacking gear. o (C) Open the engine to inspect the hot area. o (D) Use CO2 to extinguish the fire and cool the engine.

If choice B is selected set score to 1.

16. In an auxiliary diesel engine, one reason for knurling the piston skirt is to __________.

• (A) improve skirt lubrication o (B) transmit forces evenly o (C) allow for heat expansion o (D) improve the piston seal

If choice A is selected set score to 1.

17. Low compression pressure in a diesel engine can be caused by __________.

• (A) improperly seating intake valves o (B) leaking cylinder liner seal rings o (C) late fuel injection timing o (D) carbon deposits on the piston

If choice A is selected set score to 1.

18. High firing pressures and a low exhaust temperature in a diesel engine may result from __________.

o (A) increased exhaust system back pressure • (B) early fuel injection timing o (C) early exhaust valve opening o (D) low scavenge air temperature

If choice B is selected set score to 1.

Page 5 of 34 Q602 Motor Plants

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U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 19. One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a

diesel engine, is to __________.

• (A) adjust the fuel rack o (B) retard fuel injector timing o (C) reduce fuel booster pump pressure o (D) increase scavenge air pressure

If choice A is selected set score to 1.

20. Why are some diesel engine cylinder liners plated on the wearing surface with porous chromium?

o (A) The chromium will not wear out the piston rings. o (B) The chromium strengthens the liners in the way of the scavenging air ports. o (C) Chromium eliminates the need for oil scraper rings. • (D) Pores in the plating aid in maintaining the lube oil film.

If choice D is selected set score to 1.

21. If the speeder spring of a main propulsion diesel engine governor breaks while operating at full load, the engine RPM will __________.

o (A) hunt until stabilized by the droop rod o (B) increase until the overspeed trip is actuated • (C) decrease to a slightly lower value o (D) remain the same until manually changed

If choice C is selected set score to 1.

22. When disassembling or assembling an injection pump plunger and barrel you should __________.

o (A) work over a linoleum-type surface o (B) always keep the plunger and barrel as a matched set o (C) keep the parts immersed in diesel fuel • (D) all of the above

If choice D is selected set score to 1.

23. The starter control valve in the hydraulic system shown in the illustration is malfunctioning. Before removing the valve, you must first __________. Illustration MO-0049

o (A) drain the reservoir o (B) remove all plugs from the system • (C) bleed off all accumulator pressure in "E" o (D) ensure that the accumulator piston is in the charged position

If choice C is selected set score to 1.

Page 6 of 34 Q602 Motor Plants

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U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 24. Which statement about diesel engine combustion is true?

o (A) Maximum combustion pressure is reached before TDC. o (B) Combustion does not begin until the piston starts down on the power stroke. o (C) Turbulence in the cylinder causes a delay in ignition. • (D) Maximum cylinder firing pressure is not developed until the piston passes TDC.

If choice D is selected set score to 1.

25. The diesel engine shown in the illustration, is provided with an auxiliary blower to __________. Illustration MO-0003

o (A) maintain a positive pressure on the crankcase o (B) increase scavenge air pressure at full load o (C) maintain a vacuum on the crankcase • (D) provide scavenge air pressure at low load

If choice D is selected set score to 1.

26. If the speed of the propeller is 135 RPM, the speed of the engine camshaft shown in the illustration will be __________. Illustration MO-0003

• (A) 135 RPM o (B) 270 RPM o (C) variable depending on the camshaft gear train gear ratios o (D) variable depending on the ratio between engine rpm and propeller shaft rpm

If choice A is selected set score to 1.

27. How may water be removed from the bowl of the separator as shown in the illustration? Illustration MO-0127

o (A) The separator is used to remove solids from the processed liquid; therefore the accumulation of water does not present a problem.

o (B) Water may only be removed from the bowl when the unit is secured and the bowl hood is removed.

• (C) The water may be removed through the water drain valve or through the sludge ports during the sludge discharge cycle.

o (D) When the unit is secured and the bowl stops rotating, the water is drained off the bottom of the bowl through orifice ports.

If choice C is selected set score to 1.

Page 7 of 34 Q602 Motor Plants

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U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 28. According to the illustration, fuel cutoff timing in the cylinder is controlled with the component that is

identified as the letter _________. Illustration MO-0097

o (A) C o (B) H • (C) I o (D) K

If choice C is selected set score to 1.

29. While bunkering heavy fuel, what quick/easy test can one perform onboard to determine the compatibility of 'old' with 'new' fuel?

o (A) Take equal samples of both fuels, elevate their temperature, and mix them vigorously. If no frothing occurs, they are compatible.

• (B) Use blotter paper with a single concentric drop of 'old' and 'new' fuel, if they do not form separate circles, the fuels may be deemed compatible.

o (C) Mix two equal samples of the two fuels at elevated temperatures and determine if they become a homogeneous mixture.

o (D) Perform a running viscosity test of both fuels, at the same temperature, if the viscosities are equal, they should be compatible.

If choice B is selected set score to 1.

30. The device shown in the illustration is classified as a/an __________. Illustration MO-0008

• (A) comparator type mist detector o (B) Ringelmann exhaust gas analyzer o (C) reflective type explosion meter o (D) exhaust gas vapor condenser

If choice A is selected set score to 1.

31. The pinion of an auxiliary diesel-electric starting motor normally engages the flywheel ring gear by means of a/an __________.

o (A) magnetic type coupling o (B) automatic follow-up o (C) muff coupling and release • (D) Bendix drive or similar mechanism

If choice D is selected set score to 1.

Page 8 of 34 Q602 Motor Plants

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U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 32. Oil accumulating in the exhaust piping or manifold of a diesel engine can be caused by __________.

o (A) collapsed hydraulic valve lifters • (B) worn valve guides o (C) excessive crankcase vacuum o (D) excessive lube oil pressure

If choice B is selected set score to 1.

33. A bronze bearing liner with a lead-tin flashing has a milky-white color over most of its surface and some areas of exposed bronze. The white coloring indicates __________.

• (A) water contamination of the lube oil system o (B) proper break-in wear o (C) improper break-in wear o (D) relocation of the overlay flashing

If choice A is selected set score to 1.

34. When entering a ECA, when should you begin the changeover to low sulphur fuel on a slow-speed diesel vessel?

o (A) At Arrival. o (B) An hour before crossing the demarcation line for low sulphur fuel. • (C) In sufficient time to ensure the engine is burning a fuel mixture of sufficiently low sulphur to

meet the regulatory requirement. o (D) When the vessel crosses the demarcation line.

If choice C is selected set score to 1.

35. Crankcase explosions in propulsion diesel engines result from __________.

• (A) the ignition of unburned fuel and air in the crankcase o (B) the dilution of crankcase oil with particles of combustion o (C) the splashing of lubrication oil by the crankshaft o (D) broken fuel lines spraying oil on the crankcase

If choice A is selected set score to 1.

36. A main propulsion diesel engine crankshaft bearing lacking sufficient 'crush', will __________.

• (A) tend to rotate with the journal o (B) pound under load o (C) have a thicker layer of Babbitt o (D) be lubricated more easily than with sufficient crush

If choice A is selected set score to 1.

Page 9 of 34 Q602 Motor Plants

8/30/2017

U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 37. Which of the following statements is correct concerning the connecting rod and piston assembly

shown in the illustration? Illustration MO-0011

o (A) The piston is free to rotate on the carrier thrust washer. o (B) The piston pin is bolted to the connecting rod. o (C) The piston has a heat dam. • (D) All of the above.

If choice D is selected set score to 1.

38. During main engine performance testing it is noticed that the firing pressure of one cylinder is higher than the average, but cylinder compression pressure is normal. Which of the following would most likely be the cause?

• (A) Early fuel injection o (B) Worn piston rings o (C) High engine load o (D) Late fuel injection

If choice A is selected set score to 1.

39. In accordance with 46 CFR Subchapter J, which of the listed starting aids is acceptable for use with the emergency diesel-generator?

o (A) Injection of ether into the air intake. • (B) Thermostatically controlled electric water jacket heater. o (C) Thermostatically controlled electric oil sump heater. o (D) Heating the starting battery.

If choice B is selected set score to 1.

40. As shown in the illustration of the fuel injection pump, the section designated as "M" is referred to as the __________. Illustration MO-0061

• (A) plunger helix o (B) plunger relief shoulder o (C) plunger control tab o (D) plunger sleeve

If choice A is selected set score to 1.

41. If a crankcase explosion due to a hot spot were to occur, the size of the explosion is dependent on which of the following?

o (A) The temperature of the hot spot in the crankcase. o (B) The amount of debris in the oil in the crankcase. • (C) The ratio of oil mist to air in the crankcase. o (D) The amount of water in the oil in the crankcase.

If choice C is selected set score to 1.

Page 10 of 34 Q602 Motor Plants

8/30/2017

U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 42. What is a major initial ramification of receiving bunkers with a water content of 0.75% by volume?

o (A) Vessel will have to use additional efforts to reduce the water content, the oily-water separators can deal with the discharge waste water.

o (B) Economic loss of receiving less fuel, by volume, but still within ISO 8217:2010 fuel specifications.

• (C) Loss of specific heating value of fuel's thus effecting fuel consumption and engine efficiency, as well as an economic loss.

o (D) All water may be dealt with by proper use of centrifuges, thus not a significant onboard or economic/engineering problem.

If choice C is selected set score to 1.

43. Before any work is done on a burner in an automatically fired auxiliary boiler, you should always __________.

o (A) block all control valves o (B) allow the boiler to cool completely o (C) lock all safety interlock switches closed • (D) close all manually operated fuel valves

If choice D is selected set score to 1.

44. Regarding the fuel injector shown in the illustration, the purpose of piece #38 is to __________. Illustration MO-0059

• (A) filter the fuel o (B) adjust the fuel rack spring tension o (C) maintain fuel pressure at a preset level o (D) relieve excess fuel pressure to the suction side of the pump

If choice A is selected set score to 1.

45. During the valve overlap period, the exhaust pressure of a turbocharged, four-stroke cycle diesel engine must be less than the intake manifold pressure to ensure __________.

o (A) effective constant pressure for turbocharger operation • (B) effective cylinder scavenging and cooling o (C) constant pressure from the turbochargers o (D) cooler operation of the exhaust system

If choice B is selected set score to 1.

Page 11 of 34 Q602 Motor Plants

8/30/2017

U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 46. Intercoolers installed on starting air compressors, reduce the possibility of __________.

o (A) interstage vapor lock o (B) discharge pulsations o (C) dust entering the first stage • (D) lube oil carbonization

If choice D is selected set score to 1.

47. Increasing the oil pressure acting on the power piston of the hydraulic governor shown in the illustration will __________. Illustration MO-0092

• (A) increase the governor output power o (B) decrease the speed droop o (C) require the overspeed trip setting to be adjusted o (D) increase the speed droop

If choice A is selected set score to 1.

48. You are testing a closed fuel injection nozzle using a nozzle tester. A pressure slightly less than design valve opening pressure is applied. If no fuel appears at the spray tip, the __________.

• (A) needle valve is operating properly o (B) nozzle orifices are too small o (C) needle valve spring is defective o (D) nozzle orifices are eroded

If choice A is selected set score to 1.

49. If a tube ruptures in a water-tube auxiliary boiler due to low water, you should ___________.

o (A) secure the fires and maintain feed water to boiler to keep up the water level o (B) not secure the fires until water level falls out of sight in the gage glass • (C) secure both the fires and the feed inlet valve o (D) secure the fires when the pressure drops to 50% of the maximum allowable working pressure

If choice C is selected set score to 1.

50. The pneumatic circuit shown in the illustration is part of a complex large low-speed engine control system. Which of the following statements describes the function of this circuit? Illustration MO-0117

o (A) The circuit shown is used to shift the camshaft position when reversing the engine. o (B) The piston labeled A provides a low-pressure signal to the other components illustrated. • (C) Valve D, when depressed, allows the retained pneumatic pressure within the shutdown

servomotor to be relieved. o (D) When oil pressure to valve C is diminished, a pressure decrease is developed at valve D,

causing it to shift, and nullifying the actuating signal to device A.

If choice C is selected set score to 1.

Page 12 of 34 Q602 Motor Plants

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U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 51. The valve cam slope angle determines the __________.

o (A) engine fuel efficiency • (B) acceleration rate of valve opening and closing o (C) diameter of intake and exhaust valves o (D) engine torque characteristics

If choice B is selected set score to 1.

52. In what figure of the illustration does the crosshead experience the greatest side thrust? Illustration MO-0025

o (A) Figure 1 • (B) Figure 2 o (C) Figure 5 o (D) Figure 6

If choice B is selected set score to 1.

53. Which of the following statements describes what will occur if the annular spaces, indicated by the letter "K" of the device shown in the illustration, became restricted? Illustration MO-0112

• (A) The bowl will fail to close when starting and the unit will not shoot when operating. o (B) The unit will not start due to pressure/time delay relays. o (C) The bowl will fail to close, but the unit will be capable of shooting while in operation. o (D) Operating water will be supplied through port "S".

If choice A is selected set score to 1.

54. The rate of cylinder lubricating oil metered to each cylinder of a large, low-speed, main propulsion diesel engine is __________.

o (A) adjusted during each hour of operation while at constant RPM o (B) lower at sea than while maneuvering o (C) the same, whether at sea, or during maneuvering • (D) reduced during periods of low load operation

If choice D is selected set score to 1.

55. In the common rail system, excessive pressure in the header may be caused by __________.

o (A) a malfunctioning injection nozzle o (B) insufficient leakoff through injection nozzle packing • (C) improper adjustment of the bypass valve o (D) a dribble in the fuel injection nozzle

If choice C is selected set score to 1.

Page 13 of 34 Q602 Motor Plants

8/30/2017

U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 56. The purpose of the compensating adjustment used in a diesel engine hydraulic governor is to

__________.

o (A) compensate for low oil level o (B) increase governor promptness o (C) limit engine load • (D) prevent governor hunting

If choice D is selected set score to 1.

57. From the graph shown in the illustration, determine the size of the regulating ring required for the proper operation of the fuel oil centrifuge if the fuel oil specific gravity is 0.9 kg/dm3 at 68°F, and the separating temperature is 158°F. Illustration MO-0113

o (A) 86 mm o (B) 104 mm • (C) 110 mm o (D) 117 mm

If choice C is selected set score to 1.

58. When analyzing indicator card diagrams you are calculating the work output from the cylinder by obtaining the area within the curve of what type of diagram?

o (A) pressure/temperature • (B) pressure/volume o (C) pressure/enthalpy o (D) temperature/entropy

If choice B is selected set score to 1.

59. The governor utilized with the device shown in the illustration has become inoperative while the vessel is underway at sea. Which of the following statements describes what action should be taken? Illustration MO-0119

o (A) The linkage to the shut down servomotor and the governor output shaft must be disconnected in order to operate the engine via the fuel control lever.

• (B) The engine speed can be controlled using the fuel control lever without changing the position of the maximum fuel stop.

o (C) It is necessary to disconnect the shuttle valve from the throttle lever horizontal bar, in order to effectively jump out the pneumatic engine enable control circuit.

o (D) The governor should be replaced with one that has been proven to be useful in isochronous applications.

If choice B is selected set score to 1.

Page 14 of 34 Q602 Motor Plants

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U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 60. The intake and exhaust valves used in a diesel engine are returned to their seats by __________.

o (A) combustion pressure o (B) push rod pressure o (C) exhaust pressure • (D) spring force

If choice D is selected set score to 1.

61. If the bowl of a disk-type centrifugal purifier when operated as a separator is not primed, the __________.

o (A) purifier will act as a clarifier at the discharge ring o (B) oil solids will be deposited only at the intermediate top disk • (C) oil will be lost through the water discharge ports o (D) oil has a tendency to emulsify in the bowl

If choice C is selected set score to 1.

62. In the illustrated auxiliary diesel engine governor, decreasing the distance between piece 6 and piece 10 will affect the engine by __________. Illustration MO-0094

o (A) decreasing the speed • (B) increasing the speed o (C) increasing the speed droop setting o (D) decreasing the overspeed trip setting

If choice B is selected set score to 1.

63. One experiences evidences of high temperature corrosion on diesel engine combustion space components. This is exhibited by 'wire drawing' marks on exhaust valves/seats or metal reduction on cylinder heads. What causes this degradation of components?

o (A) Improper fuel injection/combustion in cylinders. o (B) Water contamination of the fuel. • (C) Vanadium, sodium and sulfur in the fuel. o (D) Excessive combustion temperatures.

If choice C is selected set score to 1.

Page 15 of 34 Q602 Motor Plants

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U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 64. The component labeled "A" on the engine reversing device shown in the illustration, performs its

function by transmitting _______. Illustration MO-0125

o (A) a hydraulic pressure which shifts an alternate set of camshaft followers to ride on the engine camshaft

o (B) an electric voltage which energizes solenoids to de-clutch the engine o (C) a fuel oil pressure signal which reverses the engine governor control cylinder • (D) a pneumatic signal which activates a hydraulic control cylinder allowing the camshaft to shift

axially

If choice D is selected set score to 1.

65. Which of the following statements describes the function of the device labeled "C" shown in the illustration? Illustration MO-0115

o (A) The device is a relief valve with feedback to prevent excessive pressure from damaging system components.

• (B) The regulator, or pressure reducer, drops the supply pressure to the desired operating level. o (C) The regulator reduces the pressure of the supply air to provide ancillary main engine services. o (D) Constant pressure is maintained at device "B" while device "C" is used only to modify the

output signal.

If choice B is selected set score to 1.

66. The purpose of an oil mist detector in a main propulsion diesel engine is to warn of __________.

• (A) a possible overheated bearing o (B) low cylinder oil pressure o (C) excessively high crankcase vacuum o (D) excessive carbon buildup in the lube oil

If choice A is selected set score to 1.

67. In the large slow-speed main propulsion diesel engine shown in the illustration, the part labeled "G" is the __________. Illustration MO-0003

• (A) fuel oil pump o (B) jacket water pump o (C) lube oil pump o (D) crankcase exhaust fan

If choice A is selected set score to 1.

Page 16 of 34 Q602 Motor Plants

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U.S.C.G. Merchant Marine Exam Chief Engineer-Limited Q602 Motor Plants Illustrations: 17 68. Which type of diesel engine fuel nozzle is shown in the illustration? Illustration MO-0059

o (A) Open o (B) Pintle o (C) Self-cleaning • (D) Multi-hole

If choice D is selected set score to 1.

69. Which construction detail is apparent in the connecting rod and piston assembly shown in the illustration? Illustration MO-0011

• (A) The piston is designed with a heat dam. o (B) It is a fork assembly. o (C) The piston is water cooled. o (D) The wrist pin is free floating.

If choice A is selected set score to 1.

70. The area indicated by the letter "W", shown in the illustration is correctly termed the __________. Illustration MO-0112

o (A) upper sliding piston chamber o (B) closing chamber • (C) opening chamber o (D) parting chamber

If choice C is selected set score to 1.

Page 17 of 34 Q602 Motor Plants

8/30/2017

National Maritime Center Providing Credentials to Mariners

6/3/2016

MO-0003

Adapted for testing purposes only from ROWEN, Introduction to

Practical Marine Engineering, Volume 2

Copyright © 2005 The Society of Naval Architects and Marine Engineers

Further reproduction prohibited without permission. Page 18 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

6/3/2016

MO-0008

Adapted for testing purposes only from LILLY, Diesel Engine Reference Book

Copyright © 1984 Butterworth and Co. (Publishers) Ltd.

Further reproduction prohibited without permission. Page 19 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

6/3/2016

MO-0011

Adapted for testing purposes only from EMD645E9 Engine Maintenance Manual

Copyright © Electro-Motive Division, General Motors

Further reproduction prohibited without permission. Page 20 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

MO-0025

Adapted for testing purposes only from Description of and Operating Instructions

for Sulzer Diesel Engines, RND-M. © Sulzer Brothers Limited.

Further reproduction prohibited without permission.

A

B

F

E

G

H

I

K

L

M

O

P R

S

T

V

N

C

J

Fig. 1 Fig. 2 Fig. 3

Fig. 4 Fig. 5 Fig. 6

D

Page 21 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

3/18/2015

MO-0049

Adapted for testing purposes only from CATERPILLAR, Service Manual, D353 Industrial

and Marine Engines. Copyright © Caterpillar.

Further reproduction prohibited without permission.

A C

E

G

B

I H

F

D

Page 22 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

4/21/2015

MO-0059

Adapted for testing purposes only from EMD 645E9 Turbocharged Engine Maintenance

Manual. Copyright © 1973 Electro-Motive Division, General Motors. Further

reproduction prohibited without permission.

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23

22

21

40

41

42

Page 23 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

7/23/2015

MO-0061

Adapted for testing purposes only from KATES/LUCK, Diesel and High Compression

Gas Engines, 3rd

edition

Copyright © 1974 by American Technical Society

Further reproduction prohibited without permission. Page 24 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

7/28/2016

MO-0092

Adapted for testing purposes only from LILLY, Diesel Engine Reference Book

Copyright © 1984 Butterworth and Co. (Publishers) Ltd.

Further reproduction prohibited without permission. Page 25 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

8/15/2016

MO-0094

Adapted for testing purposes only from CATERPILLAR, Service Manual D379,

Disassembly and Assembly

Copyright © Caterpillar

Further reproduction prohibited without permission. Page 26 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

8/24/2016

MO-0097

Adapted for testing purposes only from HUNT, Modern Marine

Engineer’s Manual, Volume II, Third Edition

Copyright © 2002 by Cornell Maritime Press, Inc.

Further reproduction prohibited without permission Page 27 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

9/12/2016

MO-0112

Adapted for testing purposes only from Instruction Manual and Parts List,

Mineral Oil Separator with Self-Cleaning Bowl, Model OSA 20-02-066

Copyright © Westfalia Separator

Further reproduction prohibited without permission. Page 28 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

9/13/2016

MO-0113

Adapted for testing purposes only from Instruction Manual and Parts List,

Mineral Oil Separator with Self-Cleaning Bowl, Model OSA 20-02-066

Copyright © Westfalia Separator

Further reproduction prohibited without permission. Page 29 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

9/20/2016

MO-0115

Adapted for testing purposes only from SULZER, Description of and

Operating Instructions for Sulzer Diesel Engines RND-M

Copyright © Sulzer Brothers Limited.

Further reproduction prohibited without permission. Page 30 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

9/21/2016

MO-0117

Adapted for testing purposes only from SULZER, Description of and

Operating Instructions for Sulzer Diesel Engines RND-M

Copyright © Sulzer Brothers Limited.

Further reproduction prohibited without permission. Page 31 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

9/22/2016

MO-0119

Adapted for testing purposes only from SULZER, Description of and

Operating Instructions for Sulzer Diesel Engines RND-M

Copyright © Sulzer Brothers Limited.

Further reproduction prohibited without permission. Page 32 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

10/18/2016

MO-0125

Adapted for testing purposes only from Servicing Instructions for Crossley Pielstick Turbo-

Charged Four Cycle Marine Engines, Type 16PC2V

Copyright © Crossley Premier Engines Limited

Further reproduction prohibited without permission. Page 33 of 34 Q602 Motor Plants

National Maritime Center Providing Credentials to Mariners

10/20/2016

MO-0127

Adapted for testing purposes only from KNAK, Diesel Motor

Ships Engines and Machinery, Drawings

Copyright © 1979 by Christen Knak

Further reproduction prohibited without permission. Page 34 of 34 Q602 Motor Plants